31results about How to "Precise drive control" patented technology

The Invention provides a motor drive semiconductor integrated circuit for driving and controlling a voice coil motor that can conduct a seek operation, a track follow operation and a settling operation through PWM control, has desired control accuracy and can be produced by a CMOS process. In a voice coil motor drive circuit (200) for executing positioning control of a magnetic head by feedback-controlling a driving current of a voice coil motor (108) for moving a magnetic head (106) over a magnetic disk for reading information from a storage track on the magnetic disk driven for rotation while a read state of the magnetic head is being monitored, head movement control such as a seek operation, a track follow operation etc, of the magnetic head is executed by PWM driving on the basis of a command value from a controller.

A nitride semiconductor laser device comprises a nitride semiconductor substrate (101); a nitride semiconductor lamination structure that has an n-type semiconductor layer (102), an active layer (104) and a p-type semiconductor layer (103) laminated on or above the nitride semiconductor substrate (101), and has a stripe-shaped waveguide region for laser light; and end surface protective films (110) on the both end surfaces substantially perpendicular to the waveguide region. In the nitride semiconductor laser device, the nitride semiconductor substrate (101) has a luminescent radiation region (112) that absorbs light emitted from the active layer (104) and emits luminescent radiation with a wavelength longer than the wavelength of the emitted light, and the end surface protective films (110) have a high reflectivity for the wavelength of the luminescent radiation from the luminescent radiation region (112). Accordingly, a nitride semiconductor laser device that does not improperly operate and has excellent FFP is provided.

The optical frequency comb generating device having two optical modulation parts 41 and 42 independently modulating optical waves propagating in two branch waveguides and a phase regulator 43 controlling a phase difference between the optical waves includes amplitude adjusting means 22 for adjusting a voltage amplitude of the RF signal supplied to at least one of the optical modulation parts, monitoring means 21 for monitoring the intensity Pout of the output light beam, and a bias control circuit 20 that controls the amplitude adjusting means to change a difference in voltage amplitude between the RF signals supplied to each optical modulation part, that detects a variation of the output light beam corresponding to the variation of the difference in voltage amplitude from the output signal of the monitoring means, and that controls the phase regulator on the basis of the detection result to adjust the phase difference.

Provided are a lens apparatus and an optical apparatus having the same, the lens apparatus including a lens holding member holding a lens, a supporting member for supporting the lens holding member movably in the direction of the optical axis of the lens, a first drive mechanism for moving the supporting member in the direction of the optical axis, and a second drive mechanism for moving the lens holding member in the direction of the optical axis, wherein a focusing lens can be moved to an in-focus position within a short time and highly accurately by an AF system.

Disclosed herein is a projector that can be loaded with lamps of a plurality of kinds, each of a plurality of the lamps loadable into the projector being given a lamp serial code formed by arranging lamp information including at least a minimum wattage and a maximum wattage of the lamp and a check sum in predetermined order. The projector includes: a lamp power supply for driving the lamp loaded in the projector, the lamp power supply being provided in advance with a plurality of mode ranges each as a range from a minimum wattage to a maximum wattage of output of the lamp power supply, and one predetermined mode range of the plurality of mode ranges being freely set in the lamp power supply; and a control circuit for controlling the lamp power supply.

Disclosed herein is a projector that can be loaded with lamps of a plurality of kinds, each of a plurality of the lamps loadable into the projector being given a lamp serial code formed by arranging lamp information on the lamp and a check sum in predetermined order, the projector including: a control circuit for performing a clocking operation of a lamp timer for managing a use time of the lamp loaded in the projector; and a memory for storing information.

The invention discloses a smart skin driving device based on shape memory effect, and belongs to the field of aviation and spaceflight. The smart skin driving device comprises a base, insulation pulleys, insulation sliding blocks and SMA (shape memory alloy) wires, the number of the insulation pulleys is at least 2, and is even integer, the insulation pulleys are arranged on one side of the base at intervals, the number of the insulation sliding blocks is corresponding to the number of the insulation pulleys, the insulation sliding blocks are arranged on the base in parallel, each insulation sliding block is connected with two SMA wires, one ends of the SMA wires are fixed on the other side of the base, corresponding to the position of the insulation pulleys, wherein the other end of any SMA wire is directly connected with the insulation sliding block, and the other end of the other SMA wire passes by the insulation pulleys to be connected with the insulation sliding block. The driving device is simple and compact in structure, capable of dual-thread driving, and can provide a stable and reliable driving force for the smart skin structure, the shape memory alloy wire material as a drive element is simple in driving conditions, safe, fast in driving response, large in driving force, small in energy consumption, energy-saving and environmentally-friendly, and free of noise and pollution.

The controller includes motor control means for controlling the drive RPM of a motor generator to reach a specified RPM less than the idle RPM when the braking condition of a foot brake is detected by a brake-operating-state detecting means while a motor generator is being rotated at an idle RPM or more. This reduces uncomfortable shock which tends to occur because of a change in the rotation of the motor during braking as much as possible to improve drive feeling.

Disclosed herein is a projector that can be loaded with lamps of a plurality of kinds, each of a plurality of the lamps loadable into the projector being given a lamp serial code formed by arranging lamp information including at least a minimum wattage and a maximum wattage of the lamp and a check sum in predetermined order, the projector including: a lamp power supply for driving the lamp loaded in the projector, the lamp power supply being provided in advance with a plurality of mode ranges each as a range from a minimum wattage to a maximum wattage of output of the lamp power supply, and one predetermined mode range of the plurality of mode ranges being freely set in the lamp power supply; and a control circuit for controlling the lamp power supply.

An electrochemical display device and an electrochemical display apparatus, having preferable cycle properties and preferable display quality, and a method for producing the same. The electrochemical display device according to the present invention is characterized in that it has: a first transparent electrode; an electrolyte layer containing a coloring material which colors by a coloring means and electrochemical reduction or oxidation, accompanied by deposition or dissolution; a second electrode having the electrolyte layer disposed between the first transparent electrode and the second electrode; and a third electrode independent of the first transparent electrode and the second electrode.

Disclosed is a coffee brewing device, comprising a coffee box, brewing mechanism, water feeding and discharging mechanism and main body bracket. The coffee box is inside the lower end of the main body bracket; the brewing mechanism at the upper end. The coffee box mechanism is connected to the brewing mechanism, with water feeding and discharging mechanism on one side of the main body bracket, connected to a water way of the coffee box mechanism. The main body bracket has a coffee inlet, a drive component for driving and connecting the brewing mechanism, a first assembling hole for installing one end of the coffee box mechanism, and a second moving guide groove for movably installing the other end of the coffee box mechanism. The coffee brewing device has accurate drive control, simple water feed, quiet, quick, stable, no dismantling or washing, long service life, reliable, and few mechanical parts.

Provided are a lens apparatus and an optical apparatus having the same, the lens apparatus including a lens holding member holding a lens, a supporting member for supporting the lens holding member movably in the direction of the optical axis of the lens, a first drive mechanism for moving the supporting member in the direction of the optical axis, and a second drive mechanism for moving the lens holding member in the direction of the optical axis, wherein a focusing lens can be moved to an in-focus position within a short time and highly accurately by an AF system.

A driving control apparatus repeats a control cycle of receiving the status value and a target control value of a controlled object and outputting the controlled variable of the controlled object. The driving control apparatus has a detector which detects any one of the position, velocity, and acceleration of the controlled object, and acquires a plurality of detection values from the detector during one control cycle. The driving control apparatus generates a status value to be input to a control unit by using the plurality of detection values.

Disclosed herein is a projector that can be loaded with lamps of a plurality of kinds, each of a plurality of the lamps loadable into the projector being given a lamp serial code formed by arranging lamp information on the lamp and a check sum in predetermined order, the projector including: a control circuit for performing a clocking operation of a lamp timer for managing a use time of the lamp loaded in the projector; and a memory for storing information.

A driving apparatus connected to a lens barrel including a movable optical member to drive the movable optical member, includes: a drive unit driving the movable optical member; a controller controlling the drive unit; a first deriving unit deriving a first information indicating at least one of position or speed of the movable optical member; and a second information indicating at least one of position or speed of the drive unit based on a counter-electromotive voltage generated through the drive of the drive unit; and a selection unit to select the first information or the second information as a selected information according to a state of a backlash of the drive unit, the controller controlling the drive unit based on: the first information or the second information selected by the selection unit; and the command information to direct driving of the movable optical member.

A driving control apparatus for driving a controlled object. The apparatus includes first and second interferometers, each of which (i) detects a position of the controlled object in a predetermined direction and (ii) produces a respective detection value. A control unit obtains a rotation amount of the controlled object based on the detection values produced by the first and second interferometers, at a predetermined measurement timing, to calculate a controlled variable based on the rotation amount and a target value, and to output the controlled variable. A generation unit generates the rotation amount based on a difference value between two average values, one being an average value of detection values that are obtained by the first interferometer between a first measurement timing and a second measurement timing, immediately after the first measurement timing, and the other being an average value of detection values that are obtained by the second interferometer between the first measurement timing and the second measurement timing. The generation unit outputs the generated rotation amount to the control unit at the second measurement timing.

The invention relates to a vehicle-mounted numerical control straw mat machine. A whole vehicle is in electric transmission, a vehicle body is provided with a cab, a driving wheel, a generator set and an electric transmission power distribution control system connected with the generator set. A ground straw picking-up device is arranged below the cab, the upper portion of the ground straw picking-up device is connected with a straw feeding device through a straw distribution channel, and a straw mat weaving device and a straw mat roll driving device are sequentially arranged at the tail end of the straw feeding device. The vehicle body is provided with a wire supply device, and a wire positioned on the wire supply device is connected with the straw mat weaving device. The vehicle-mounted numerical control straw mat machine is driven by one person, straw can be directly collected in fields and be automatically woven into a straw mat, and not only is working efficiency improved, but also plenty of manpower and material resources are saved; the problem that weaving quality of the straw mat is poor when the straw picking-up amount is sometimes more and sometimes less is solved through a weaving method for the vehicle-mounted numerical control straw mat machine, and the weaving quality of the straw mat is improved.

The invention discloses a filter-type LED billboard decoration lamp driving system. The system is characterized by mainly comprising a driving chip U1, a brightness sensor RS, a capacitor C2, a capacitor C4, a resistor R3, a power supply circuit, a filter circuit and a driving circuit. According to the technical scheme of the invention, due to the arrangement of the driving chip U1, the peripheral power supply circuit and the driving circuit, the illumination intensity collected by the brightness sensor RS is accurately processed, so that an LED lamp set can be accurately controlled to be timely switched on when the light brightness is insufficient. Meanwhile, the LED lamp set is switched off when the light brightness is sufficient. Meanwhile, the illumination of the LED lamp set is ensured to be stable after the LED lamp set is switched on. Therefore, the filter-type LED billboard decoration lamp driving system is suitable for further popularization and application.

The present invention provides a fabric transferring device of a sewing machine. The device comprises a fabric feeding tooth for feeding of fabrics and a pressure leg. A pair of left and right fabricfeeding belts are arranged at the external portions of left and right sides of the pressure leg in a direction approximately orthorhombic to a sewing traveling direction and is acted at the upper surface of the fabric, the fabrics are forcedly transferred in a length range being in contact with a needle plate in a sewing traveling direction at the surface of the pressure leg. The device further comprises a transmission belt drive mechanism configured to allow the fabric feeding belts to perform synchronization connection with the fabric feeding tooth to cause intermittent drive and a belt up-and-down movement drive mechanism configured to perform drive and connection and up-and-down movement of the fabric feeding belts and the pressure leg. The cost is low compared to the addition of partsof the sewing machine, and in a condition that part and all of fabrics pasting rubber and the like are taken as sewing objects, if even the fabric sewing portions are subjected to transferring resistance caused by friction, and transferring is reliably and smoothly performed to complete a good sewing product.

The invention discloses a wireless intelligent control worm gear stepless positioning ball valve control system, which includes a valve body at the field end, an electric actuator and a valve controller; a remote end for remote monitoring of the field end, a valve controller at the field end and a remote end Wireless data transmission and control are established between the valve controller and the electric actuator, and the output shaft of the electric actuator and the ball valve rotating shaft in the valve body are connected with coaxial teeth; realize the intelligent control ball valve in the open Stepless self-locking position flow between , off and switch, the invention also discloses an automatic irrigation system of the Internet of Things using a wireless intelligent control worm gear stepless positioning ball valve control system.

The invention belongs to the technical field of pipeline valves, and discloses a gate valve with parallel double braces, which includes a valve body, a valve stem, a wedge pressure block, a first valve plate, a second valve plate and a rotating shaft; the valve body is provided with a control hole, a wedge The pressing block is located in the control hole and is provided with a T-shaped hole. The rotating shaft is a T-shaped shaft located in the T-shaped hole and can rotate relative to the wedge pressing block; the first valve plate is a wedge-shaped plate, and the wedge-shaped surface of the first valve plate is in contact with the wedge The wedge-shaped surfaces of the pressure block are parallel to each other, and the wedge-shaped surface of the first valve plate is provided with a first connecting groove; the second valve plate is a wedge-shaped plate, and the wedge-shaped surface of the second valve plate is parallel to the other wedge-shaped surface of the wedge pressure block. The wedge-shaped surface of the second valve plate is provided with a second connecting groove; the valve rod drives the wedge pressure block to move along the control hole; the wedge pressure block can drive the first valve plate and the second valve plate to move through the rotating shaft, and the wedge pressure block can also move Can move relative to the first valve plate and the second valve plate. The parallel double spreader gate valve of the present invention can be used in different installation modes and has better stability and reliability.